1. QuickTime 7.7.7 or later requires Windows Vista or Windows 7.
2. QuickTime also supports import of multiple images and layers in TIFF and Photoshop files.
3. ​Playback of program and elementary streams is available via the QuickTime MPEG-2 Playback Component, sold separately in the Apple Online Store. This component isn't needed in OS X Lion v10.7 or later, because MPEG-2 functionality is built in.
4. Some codecs are not available in the QuickTime Web Plug-in.